Lubricator for pistons and cylinders



(No Model.)

A. 83 E. R. SIMPSON & M. SPEIOHER.

LUBRIGATOR FOR PISTONS AND CYLINDERS.

No. 331,331. Patented Dec. 3, 1333.

UNITED STATES PATENT Oriana...

ALEXANDER SIMPSON AND ELLIS B. SIMPSON, OF SORANTON, AND MATHIASSPEIOHER, OF ARCHBALD, PENNSYLVANTA.

LUBRICATOR FOR PISTONS AND CYLINDERS.

EPECZEICATION forming part of Letters Patent No. 331,831, dated December8, 1885.

Application filed OCfLlifii' 15, 1335.

To aZZ whom it may concern:

Be it known that we, ALEXANDER, SiMrsOn, ELLIS R. SIMPSON, and MATHIASSrnrcnna, all citizens of the United States, ALEXANDER SIMPSON and ELLIsR. SIMPSON residing at Scranton, and FIATHIAS SPEIOHER, residing atArchhald, in the county of Lackawanna and State of Pennsylvania, haveinvented certain new and useful Improvements in Lubri- IO caters forPistons and Cylinders, of which the following is a specification,reference. being hadtherein to the accompanying drawings.

This invention relates to the construction of pistons to pumps and thepacking of the {5 piston to always have a tight fit in the cylinder, andat the same time to keep the piston properly lubricated within thecylinder, and is an improvement upon the Patent- No. 316,492 Obtained byus April 28,1885; and it consists in the special construction of some ofthe on erative parts, as will be fully hereinafter described.

In the drawings, Figure 1 represents a side view of the device, partlyinsection. Fig. 2 represents a sectional view of the piston-head and itsconstruction to receive the packing rings. Fig. 3 shows a transversesection of same on line :0 :0 of Fig. 2. Fig. 4 represents an edge viewof a divided spring packing-ring, and Fig. 5 represents a modificationof the divided spring packing ring represented in Fig. 4.

A represents a hollow pistonrod of the proper size.

B represents a piston-head of cast metal that is cast around and uponthe hollow piston-rod, after which the head is turned to the properlength, and to be parallel with the longitudinal center of the rod A,and of a diameter a trifle less than the bore of the cylinder C. Thishead cast upon the piston-rod secures the rod and head together, makingone complete and solid casting, thus saving the usual expense of fittinga connection of the two by bolts and nuts, as is usually the case in attaching a piston-rod to the head, and avoids all the liability of therod becoming loose from the head, as there is nothing to come looseshort of a break of the metal itself. I After the piston-head is turnedand fitted to the right size to easily go into the bore of the cyl-Serial No. 180,025. (X0 model.)

inder, grooves b are, one, or any number more than one, turned in thesurface of the circumference of the head to a proper depth. Thrn thehead is bored to have the radial passages Z) from the hollow piston-rodinto the groove 1), as seen in Figs. 2 and 3.

D represents a grooved and slitted spring packing'ring of the width toclosely fit in the grooves b of the pistou head, curved to a per- 6Ofect circle on its perimeter, and of adiameter, when free, to be atrifle greater than the inside diameter of the cylinder C, and soslitted at d that it can be compressed in diameter to easily enter andfreely slide in the bore of the 6 cylinder. This spring ring-packing isa trifle greater in its inner diameter than the diameter oft-hebottomofthe groove bin the piston-head, has a ci rcu niferential groove, (1,in its edge with the rubbing-surfaces d" on each side of the groove cl,that bear againstthe inside surface of the cylinderin itsreciprocations, and has holes d, from groove d,to ward the center ofthehead B,ofwl1ich holes there may be the same numher, and to agree intheir location with the holes 1 in the head B; or they may not so agree,as the spring-packing D can revolve in the groove I) when desired. Thering D may be slit diagonally, as seen in Fig. i, or it may be aslip-splice, as seen in Fig. 5, as the kind So of slit or splice doesnot avail, as any kind of such splice that will allow the ring to expandor contract in the groove will answer the purpose.

The device for supplying the lubricating substance is the same as shownand described in said Patent NO. 316,492, which consists of thepiston-rod A, having the longitudinal hollow or bore A, a stopper orhead, a, atits outer end to close the bore A, which bore is 0 connect-edto a supply-tube, F, having a passage, e, therein, Stop cock or valve,F, a tallow, tar, or other proper lubricating cup,

G, and a screw -forcing plug, H, as seen in Fig. l.

The operation is as follows: The soft tallow,

tar, or other lubricant is placed in the cup G. The screw-plug H isturned to screw the plug upon the lubricant in the cup, which forces aportion into opening or passage 6 of I00 tube E, and thence into thebore A of the piston-rod, filling it so as to force the lubricantthrough the radial passages bin the head B underneath the slittedspring-ring, D, .forcing the ring-packing outward, so that therubbing-surfaces d will closely fit the bore of the cylinder 0, and atthe same time the tallow or lubricant will be forced under the springpackjug-ring in groove b, so that all parts of the ring are supportedupon the lubricant, while a portion of the lubricant is forced throughholes 01 into the groove d of the ring D, filling the groove d,throughwhich the lubricant is forced into the circumferential groove d, wherebyit is brought in contact with the cylinder, thus completelylubricatingthe surfaces.

By the above construction it will be seen that by forcing the tallowthrough the intermediate passages against the rings D, it is possible toobtain great pressure against the rings, thus causing them to bear withany desired force againstthe cylinder 0, thus obtaining an efficient andtallow packing, whereby the we r of the piston-head and cylinder isgreatly diminished. c

Having thus fully described our invention, what we claim, and desire tosecure by Letters Patent, is-

1. In a lubricating device, the combination, with the soft-fallow cupprovided with an opening in its bottom connecting with a hollowpiston-rod, a piston-head formeuintegral with the rod, having grooves onits periphery, and provided with radial passages, and radial holesconnecting with said passages, of a grooved and slitted springring-packing adaptl ed to fit in said grooves and bear against acylinder, substantially as described.

2. In a device for lubricating with a semifluid or soft tallow, thecombination,with the cup containing the soft tallow, a forcing-plug, acheck cook or valve, and means for conveying the semi-fluid to and"between the pistonhead and cylinder, of a slitted spring-ring packingadapted to surround the piston-head, substantially as described.

3. The combination, with a cylinder, of a hollow piston havingperipheral grooves there in, and openings leading, from the interior ofthe hollow piston to said grooves, split rings located within saidgrooves and having openings for the escape of thelubricaut, and a hollowpiston-rod connected with the hollow pistonhead, substantially asdescribed.

4. The combination, witha cylinder, of a hollow piston having peripheralgrooves therein, and openings leading from the interior of the hollowpiston to said grooves, and split. rings located within said grooves,and means whereby the lubricant when escaping will cause the rings toexpand and form a tight packing between the cylinder and piston,substantially as described.

In testimony whereof we have aftixed'our signatures in presence of twowitnesses.

ALEXANDER SIMPSON. ELLIS R. SIMPSON. MATHIAS SPEIOHER. Witnesses:

E. W. SOHARAR, URIAH MoDoNNnLL.

